Portable-electric-lamp holder.



0. CARSON. PORTABLE ELECTRIC LAMP HOLDER.

APPLICATION FILED FEB. 24, 1915- Latented May 1, 191?.

nnunnn ll )Ill CLARENCE mason, or NEW YORK, N. Y., ASSIGNOR T H. W. JoHNs-MAnvILLn .GOMBANY, A CORPORATION or nnw YORK.

' PORTABLE-ELECTRIC-LAMP HOLDER.

Specification of Letters Patent.

Patented May 1, 1917.

Application filed February 24, 1915. Serial No. 10,243.

}- small incandescent -electr'ic lamps, into which holder a standardcell of dry battery can be fitted and the conipleted structuretransported and manipulatedfor light giving. purposes without subjectingthe battery poles. to any strain other than that necessary fonsecuringtio'ns. i

- -I-t has*becn csaiAeration to mount such small electric-lamps on drybatteries and proyi-de a handle by which such completed structure canbeheldin use and transportation, but insuch prior devices the bindingscrews-and poles of the battery have been utilized as" the sole means ofme 'chanical attachment of the lamp holder to nthe hattery cell, withthe result that these somewhat fragile connections soon become Iloosened andthe continuity ofthe electrical circuit destroyed orimpaired. I have overcome this difficulty by so designing the holderthat the body ,of the battery shell is firmly grasped by spring clips orother frictional devices which support the weight, and only such contactwith the battery terminals is employed as is necessary to insureelectric conductivity. The bestform; of ap paratus at present known tome embodying I my invention is illustrated in the accompanying sheet ofdrawings in which,

Figure 1 is a side elevation of the complete apparatus, parts beingbroken away, with battery and lamp in position, andi Fig. 2 is ahorizontal section on line 2-2 of Fig. 1. i

Throughout the drawings like reference characters indie-ate like parts.1

1, represents a standard form of dry battery cell having a cylindricalshell, a central pole 2, in shape of a contact screw, and a similarperipheral pole 3. -My improved form of lamp and battery holdercomprises a shield 4 formed preferably of a sheet of i spring steelshaped to hug the battery shell the battery'. designedtofa'fifordpfconvenient holder for.

good electrical connec} and extend around about two thirds of thecircumferencethereof, a metal strip 5, bent outwardly; to *fornnaconvenient handle 6, as shown in Fig. 1, fastened to the shield 45, asby rivets 20, 20, havingits free end bent up over the'end of the batteryin Ushaped formation 7, to serve as a support for lamp socket l0, andreflector 8, and perforated to receive the peripheral binding screw 3,of

9, is aflsm'all-incandescent electric lamp,

the -base.-of which is screwed into, and

.tln'ou-gln the open-ended; internally threaded meta'l shellglO, whichforms its supporting socket, "thecentral plug or terminal 12,

-and its surreunding-insulation 11, project which. ma fof "metalq and'is looselymounted on the jU sha-ped portion 7, of the, metal stripasiby passing through slots 2'1,

21, therein. The end of this bar 13. nearest the handle 6, maybe bent upas shown at H g-toserve j'a -convenient meansfor. manipulating the ,barby the thumb of the hand grasping :handlelfil This switch bar carries anirrdeperrdent'electrical conductor adapted to complete thecircuit"fromcentral battery pole 2, to central lamp terminal 12. This conductor mayconsist of an upper spring contactlS, and lower springcontact 19,electrically connected by bolts or rivets 17. 17, passing through bar13, all parts being insulated-from bar 13, by sheets of insulation'l5,15, and-thimbles or bushings 16, 16. The-"switch barmayhave a notch 2-1in its upper surface to engage the strip 5, as shownin Fig. 1.

In use thepa'rts' are arranged as shown, the binding nut 23, onperipheral pole 3, being preferably screwed down on' the end of stripwhile binding nut 22, on central pole 2, is preferably screwed down asshown so as to leave the upper endof the binding screw projectingtherethrough. One or both of these binding nuts may be dispensed with.Hence the lamp holder is still operative with batteries from which thebinding nuts have been lost. When the parts are in. the position shownin the drawings the pircuit leads from one pole of battery 1,

as from peripheral pole 3, through half of the U-shaped portion 7 ofstrip 5, to shell -10, of the lamp socket, thence through the lamp andout by central terminal 12, thereis -a switch-bar, onslidingmmber,

switch 13, is slid to the right, contact 18, is

separated from the central terminal 12, of

, lamp 9. and the lamp is cut out of circuit.

\Yhen the battery is exhausted, binding nut 23. is removed. the batterypulled out of the spring clip Formed by shield 4, a new cell ol batteryis substituted and the operations above described. continue.

Among the advantages of my'invention may be mentioned. (in addition tothe relieving of the. battery terminals of all strains), the reductionof the number of parts to a minimum, simplicity of switch and ease ofoperation by the hand holding the apparatus. and the vertical directionof light rays produced. as a result of which last nn-ntioned feature auser can conveniently throw the full light on the underneath portion ofa motor car and contained mechanism.

Various changes tion of the mechanism herein shown and described couldbe made without le )arting from the principle of my invention. OtherForms ol 't'riction holding clip could be substituted tor the springshield l. The conuections to thebimling posts and arrangement o'l switchor circuit breaker might be varied. The lamp socket might be mountgd atother points in the strip and other similar modifications to meetspecialrequirements made while still retaining part or all ol my invention.

l'laviug described my invention, ll claim:

1. .i holder for an electric lamp adapted to be attached to a batterycomprising in combination a metal strip adapted LO make contact with onepole of theliattery, a

spring clip adapted to grasp the battery shell. a socket for the lamp,in circuit with the strip, and an independent conductor carried by. butinsulated from the strip and adapted to complete the circuit from thecentral terminal of the lamp to the other pole ol the battery.

'3. It holder for an electric lamp adapted to be attached to a batterycomprisingin combination a metal strip adapted to make contact with onepole oi the battery, a spring clip adapted to grasp the battery shell. asocket for the lamp, in circuit with the strip, and an independentconduct-or carried by, but insulated from the strip and in details ofconstrucadapted to complete the circuit from the.

central terminal of the 'lamp'to' the other pole of the battery, saidindependent eonduetor being movable with-reference to the strip sons toserve as acircuit opening and closing device.

3. The coml'iination of a anetal strip adapted to make contact-with theperipheral pole'ot' a battery, an internally threaded, open-ended metalshell. carried by said strip adapted to serve as a socket for anincandescent electric lamp, a sliding member mounted on said' strip. anda conductor mounted on said sliding member, but insulated therefrom, andhaving spring terminals adapted to engage the central pole of thebattery and the central terminal of the lamp. i

4. The combination of. a curved sheet of spring metal adapted to grasp adry battery cell. a metal strip fastened to the sheet and bent to form ahandle therefor, while a free end extends over the top of battery cellin U-shaped formation with its outer end in contact with theperipherz'll pole thereof, a

socket 't'oi an viucandescent lamp mounted on and in circuit with the Ush'aped portion of said strip. and a sliding member mounted on theU-shaped portion of the strip carrying a conductor insulated from thestrip and provided with spring terminals which are in contact with boththe central pole of the battery and the central terminal of a lamp heldin the before mentioned socket when the sliding member is in oneposition, but one of which is out of such contact When the slidingmember is in another position.

The combination of a metal strip sulated therefroimnnd having springterminals adapted to engage the central pole of the battery and thecentral terminal of the lamp, said sliding member having a notchengaging the metal strip when said sliding member is in one position.

. CLARENCE CARSON.

Witnesses:

CHARLES HORTON, C. B. GEQRGEN.

